Lock Snapping and Anti-Snap Locks

What is lock snapping?

Lock snapping is now the preferred method used by burglars which includes applying pressure to the lock cylinder which then snaps the cylinder in two parts.  This enables the burglar to remove the outer part of the lock, unlock the door and enter your home.

This method can literally take seconds to do and does not need specialist tools.  A burglar using this method can gain access to your home in a matter of seconds. Using this method does not involve any technical knowledge or experience.

The locks that are vulnerable to lock snapping are euro cylinder locks that are not approved and tested to TS007 3* or SS312 Diamond British Standard.  These types of locks are most common in uPVC doors and also timber and aluminium doors which have been fitted within the last 15 years.

Are Your Locks Anti-Snap?

The only way to know for sure if your lock is an anti-snap lock is to remove it from your door and see if it has the anti-snap lines running along it.  If you do this, then we would recommend using a professional locksmith.  If you remove your lock then refit it again, you need to make sure it is fitted properly as you could be jeopardizing the security of your home.

Even if your lock displays the British Kitemark, this does not mean it is an anti-snap lock. The best advice we can give is ask a professional locksmith for advice on your locks or replacement locks.

How Can I Prevent Lock Snapping?

You can fit your doors with an Anti-Snap Lock to help prevent a break in anti-snap locks have a higher security marking and are more resilient to the lock snapping technique. If you are wondering if anti snap locks snap?  Yes, they can snap but they are designed to snap in certain place which is away from the centre of the lock mechanism which is the weakest part of the lock.

Anti-Snap lock cylinders have a line cut into the cylinder which must face the outside of the door.  This line is known as a sacrificial snap line.  When pressure is applied to an anti-snap cylinder, just the point will snap off which means your door will remain locked as the locking mechanism will remain intact.


Different Anti Snap Locks.


The SS stands for Sold Secure and with it should be an illustration of a diamond on the lock.

The SS312 was introduced in around 2011 and was produced to try and deal with the outbreak of lock-snapping and is considered to be the highest level of approval for cylinders in the UK.



The TS007 kite-mark symbol is normally pictured next to the face of the lock cylinder. It may also have some stars next to it which refer to the quality of the lock.  If it has one star, then this has NOT been tested for anti-snapping.  If it has 3 stars, then it has been fully tested.  If the lock is marked with three stars and the BSI Kitemark then this is known as a SUPER CYLINDER.

The advantages of having a BSI Kitemark approved TS 007 lock is that they can prove that these locks have been independently certified by a third party. A third-party accreditation is an assurance that the lock has been independently approved and tested by another organization as well as the manufacturer.

If you need a reliable local locksmith to come and upgrade your existing locks to anti-snap locks in Blackpool or the surrounding areas then contact Apex Mobile Locksmiths today – 01253 713 658

If you require any of our locksmith services in Blackpool, Lytham St Annes, Preston, Cleveleys, Poulton, Fleetwood, Garstang, Preston, Kirkham, Penwortham, Leyland or Chorley then call us on 01253 713 658 or 07752 314 894

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My name's Steve, I'm a local locksmith based in Blackpool. How can I help?